97 lines
3.2 KiB
C++
97 lines
3.2 KiB
C++
/****************************************************************************
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**
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** Copyright (C) 2011 Nokia Corporation and/or its subsidiary(-ies).
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** All rights reserved.
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** Contact: Nokia Corporation (qt-info@nokia.com)
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**
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** This file is part of the examples of the Qt Toolkit.
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**
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** $QT_BEGIN_LICENSE:BSD$
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** You may use this file under the terms of the BSD license as follows:
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**
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** "Redistribution and use in source and binary forms, with or without
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** modification, are permitted provided that the following conditions are
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** met:
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** * Redistributions of source code must retain the above copyright
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** notice, this list of conditions and the following disclaimer.
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** * Redistributions in binary form must reproduce the above copyright
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** notice, this list of conditions and the following disclaimer in
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** the documentation and/or other materials provided with the
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** distribution.
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** * Neither the name of Nokia Corporation and its Subsidiary(-ies) nor
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** the names of its contributors may be used to endorse or promote
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** products derived from this software without specific prior written
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** permission.
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**
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** THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
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** "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
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** LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
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** A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
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** OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
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** SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
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** LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
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** DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
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** THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
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** (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
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** OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE."
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** $QT_END_LICENSE$
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**
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****************************************************************************/
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#include <QImage>
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#include <QList>
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#include <QThread>
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#include <QDebug>
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#include <QApplication>
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#include <qtconcurrentmap.h>
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#ifndef QT_NO_CONCURRENT
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QImage scale(const QImage &image)
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{
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qDebug() << "Scaling image in thread" << QThread::currentThread();
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return image.scaled(QSize(100, 100), Qt::IgnoreAspectRatio, Qt::SmoothTransformation);
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}
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int main(int argc, char *argv[])
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{
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QApplication app(argc, argv);
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const int imageCount = 20;
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// Create a list containing imageCount images.
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QList<QImage> images;
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for (int i = 0; i < imageCount; ++i)
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images.append(QImage(1600, 1200, QImage::Format_ARGB32_Premultiplied));
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// Use QtConcurrentBlocking::mapped to apply the scale function to all the
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// images in the list.
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QList<QImage> thumbnails = QtConcurrent::blockingMapped(images, scale);
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return 0;
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}
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#else
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#include <QLabel>
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int main(int argc, char *argv[])
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{
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QApplication app(argc, argv);
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QString text("Qt Concurrent is not yet supported on this platform");
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QLabel *label = new QLabel(text);
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label->setWordWrap(true);
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#if defined(Q_WS_S60) || defined(Q_WS_MAEMO_5)
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label->showMaximized();
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#else
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label->show();
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#endif
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qDebug() << text;
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app.exec();
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}
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#endif
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